Lord David Owen: "Balkan Odyssey"

Page 260:

...General Rose was reportedly
furious and went to the Bosnian Presidency to persuade President Izetbegovic
and his military chief, General Delic, to attend. Those
around General Rose have never made any secret of the fact that at that
meeting he told the Bosnian Muslim leaders that he had just recieved technical
information which pointed to the mortar bomb
having come not from Serb-controlled areas but from a Muslim-controlled
area. If this information were made available there would be
a very different outcome in the NATO meeting, and if Izetbegovic tried
to stall the UN negotiations in order to wait for the NATO meeting he,
Rose, would feel obligated to release the preliminary evidence of the UN
investigation. If the government negotiation team were not at Sarajevo
airport on Wednesday 9 February then he would call a press conference.

Same page, below and - page
261, top:

In addition,
a senior ballistic expert in Zagreb has studied a map of likely trajectory
patterns produced by UN investigators in Sarajevo and believed the angle
at which the mortar had hit the roof of the market stall indicated that
the firing point was more likely to be 1,100 - 2,000 metres from the impact
than 2,000-3,000 metres, and that this would tend to indicate that the
mortar had been fired from a Bosnian army position.
When this highly charged information reached
the UN in New York on Tuesday everything was done to clamp down on the
number of people who saw it so as to reduce the chance of press leak.